volume_mute
Area of a Regular Octagon
publish date: 2026/05/16 21:27:29.667974 UTC
A regular 8-sided octagon features an apothem of \(12\text{ cm}\) and a single edge boundary line of \(10\text{ cm}\). Find the total area.
Answer = (1)
Correct Answer
(1) 480
Explanation
Perimeter \(P = 8 \times 10 = 80\text{ cm}\). Area \(A = \frac{1}{2}aP = \frac{1}{2} \times 12 \times 80 = 480\text{ cm}^2\).
Reference
Mathematics for college students